U.S. patent application number 14/077089 was filed with the patent office on 2014-05-15 for battery system.
This patent application is currently assigned to MAGNA STEYR Battery Systems GmbH & Co OG. The applicant listed for this patent is MAGNA STEYR Battery Systems GmbH & Co OG. Invention is credited to Peter Damon, Georg EICHBERGER.
Application Number | 20140134469 14/077089 |
Document ID | / |
Family ID | 47146274 |
Filed Date | 2014-05-15 |
United States Patent
Application |
20140134469 |
Kind Code |
A1 |
Damon; Peter ; et
al. |
May 15, 2014 |
BATTERY SYSTEM
Abstract
A battery system having at least one battery cell, an absorption
element, and a temperature-control system having a liquid
temperature-control medium configured to cool and/or heat the
battery cells in a battery housing, and a motor vehicle having such
a battery system.
Inventors: |
Damon; Peter; (Lassnitzhohe,
AT) ; EICHBERGER; Georg; (Graz, AT) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
MAGNA STEYR Battery Systems GmbH & Co OG |
Zettling |
|
AT |
|
|
Assignee: |
MAGNA STEYR Battery Systems GmbH
& Co OG
Zettling
AT
|
Family ID: |
47146274 |
Appl. No.: |
14/077089 |
Filed: |
November 11, 2013 |
Current U.S.
Class: |
429/120 |
Current CPC
Class: |
H01M 10/625 20150401;
H01M 2/1077 20130101; H01M 10/613 20150401; Y02E 60/10 20130101;
H01M 10/63 20150401; H01M 10/6567 20150401 |
Class at
Publication: |
429/120 |
International
Class: |
H01M 10/63 20060101
H01M010/63; H01M 10/625 20060101 H01M010/625 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 12, 2012 |
EP |
12192300.7 |
Claims
1. A battery system, comprising: a battery housing; battery cells
in the battery housing; a temperature-control system having a
liquid temperature-control medium configured to cooling and/or heat
the battery cells in the battery housing; and at least one
absorption element arranged between the battery cells and the
battery housing and configured to absorb any of the liquid
temperature-control medium discharged from the temperature-control
system, wherein: the at least one absorption element is composed of
a non-woven material including fibres of at least two different
fibre types, at least one of the at least two fibre types being a
supporting fibre and at least one other of the fibre types being an
absorption fibre; and the non-woven material has an average
area-related mass in a range between 250 to 700 g/m.sup.2.
2. The battery system of claim 1, wherein the non-woven material
has an average area-related mass in a range between 300 to 450
g/m.sup.2.
3. The battery system of claim 1, wherein: a weight proportion of
the supporting fibre is in a range between 1% and 40%; and a weight
proportion of the absorption fibre is in a range between 60% and
99%.
4. The battery system of claim 1, wherein: a weight proportion of
the supporting fibre is in a range between 2% and 30%; and a weight
proportion of the absorption fibre is in a range between 70% and
98%.
5. The battery system of claim 1, wherein, in an unloaded state,
the absorption element has an overall height in a range between 3
mm to 40 mm.
6. The battery system of claim 1, wherein, in an unloaded state,
the absorption element has an overall height in a range between 3
mm to 10 mm.
7. The battery system of claim 1, wherein the absorption element
has a reduced overall height in certain sections thereof.
8. The battery system of claim 7, wherein the sections of the
absorption element with a reduced overall height in the unloaded
state have a same density as sections of the absorption element
with a non-reduced overall height.
9. The battery system of claim 7, wherein the sections of the
absorption element with a reduced overall height in the unloaded
state have a same area-related mass as sections of the absorption
element with a non-reduced overall height.
10. The battery system of claim 1, wherein the absorption element
is arranged in an elastically pressed manner between the battery
housing and the battery cells, the degree of elastic pressing in a
range between 1% to 80%.
11. The battery system of claim 1, wherein the absorption element
is arranged in an elastically pressed manner between the battery
housing and the battery cells, the degree of elastic pressing in a
range between 10% to 50%.
12. The battery system of claim 1, wherein the absorption fibre is
configured to bind the liquid temperature-control medium in a
pressure-resistant manner.
13. The battery system of claim 1, wherein the absorption element
directly abuts against the battery housing at least in sections
thereof.
14. A motor vehicle, comprising: a battery system that includes: a
battery housing; battery cells in the battery housing; a
temperature-control system having a liquid temperature-control
medium configured to cooling and/or heat the battery cells in the
battery housing; and at least one absorption element arranged
between the battery cells and the battery housing and configured to
absorb any of the liquid temperature-control medium discharged from
the temperature-control system, wherein: the at least one
absorption element is composed of a non-woven material including
fibres of at least two different fibre types, at least one of the
at least two fibre types being a supporting fibre and at least one
other of the fibre types being an absorption fibre; and the
non-woven material has an average area-related mass in a range
between 250 to 700 g/m.sup.2.
15. The battery system of claim 14, wherein the absorption element
has a reduced overall height in sections thereof.
16. The battery system of claim 15, wherein the sections of the
absorption element with a reduced overall height in the unloaded
state have a same density as sections of the absorption element
with a non-reduced overall height.
17. The battery system of claim 15, wherein the sections of the
absorption element with a reduced overall height in the unloaded
state have a same area-related mass as sections of the absorption
element with a non-reduced overall height.
18. The battery system of claim 14, wherein the absorption element
is arranged in an elastically pressed manner between the battery
housing and the battery cells, the degree of elastic pressing in a
range between 1% to 80%.
19. The battery system of claim 14, wherein the absorption element
directly abuts against the battery housing at least in sections
thereof.
20. A battery system, comprising: a plurality of battery cells; a
temperature-control system configured to permit a flow of a liquid
temperature-control medium to at least one of cool and heat the
battery cells; and an absorption element composed of a supporting
fibre and an absorption fibre and which is arranged adjacent to the
battery cells and configured to configured to absorb and bind any
of the liquid temperature-control medium discharged from the
temperature-control system.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims priority 35 U.S.C. .sctn.119
to European Patent Publication No. EP 12192300.7 (filed on Nov. 12,
2012), which is hereby incorporated by reference in its
entirety.
TECHNICAL FIELD
[0002] Embodiments relate to a battery system having at least one
battery cell, an absorption element, and a temperature-control
system having a liquid temperature-control medium configured to
cool and/or heat the battery cells in a battery housing, and to a
motor vehicle having such a battery system.
BACKGROUND
[0003] Battery systems having a plurality of battery cells are
used, in particular, as energy stores for a drive of electric and
hybrid vehicles. In order to ensure an optimum function of the
energy store, it is necessary to keep the temperature of the
battery cells in a desired operating range. In order to prevent the
operating temperature being exceeded and/or undershot, active or
passive temperature-control systems are used. The use of liquid
temperature-control medium with a high thermal capacity has proven
itself particularly, which temperature-control medium is guided
along the battery cells in a satisfactorily thermally conducting
manner, in a heat exchanger.
[0004] It is a problem, however, in the case, for example, of an
accident of a vehicle which is equipped in this way. Leaks, and
therefore, the discharge of the temperature-control medium from the
cooling element may occur. The temperature-control medium may then
pass into direct contact with the battery cells and, as a result of
its conductivity, may cause a short circuit, for example.
[0005] A battery system is known from German Patent Publication No.
DE 10 2010 010 844 A1. The battery system which is disclosed
therein describes a storage module for voltage supply, in
particular of a vehicle with a number of storage cells which in
each case have a first and a second connector terminal of different
polarity and a valve. The storage cells are connected electrically
via the connector terminals to form the storage module. An internal
pressure which is present in a storage cell may be dissipated and
electrolyte may be discharged from the storage cell via a
respective valve.
[0006] The storage cells of the storage module which is described
have a valve in the form of a predetermined break point. This
predetermined break point makes it possible for excess electrolyte
to be discharged from the interior of the storage cell in the case
of ageing of the storage cell. Since the electrolyte which is used
in storage cells is usually electrically conducting, this may lead
to short-circuits within the storage module and the function of the
entire storage module may no longer be ensured.
[0007] Conventional devices are not suitable for binding large
amounts of temperature-control medium which are discharged from a
temperature-control system in the interior of a closed battery
housing in the case of damage, and thus, are not suitable for
effectively preventing damage to battery systems and cells.
SUMMARY
[0008] Embodiments relate to an enhanced battery system(s) with
increased operational security and, in particular, having a simple
and inexpensive structural configuration which is relatively
insusceptible to faults.
[0009] Embodiments relate to motor vehicles having an enhanced
battery system(s).
[0010] In accordance with embodiments, a battery system may include
at least one of: battery cells, a temperature-control system having
a liquid temperature-control medium configured to cool and/or heat
the battery cells in a battery housing, at least one absorption
element configured to receive the liquid temperature-control medium
and which is arranged spatially between the battery cells and the
battery housing and composed of a nonwoven material having an
average area-related mass of from 250 to 700 g/m.sup.2 with at
least two different fibre types, at least one of the fibre types
being a supporting fibre and at least one other of the fibre types
being an absorption fibre.
[0011] In accordance with embodiments, a battery system for a motor
vehicle may include at least one of: at least one battery module
and at least one battery system operatively connected to the at
least one battery module. Among other things, the crash behaviour
of the motor vehicle is enhanced and the risk of resulting damage
(for example, short-circuit, fire) of a collision is reduced.
[0012] In accordance with embodiments, a battery system may include
at least one of: a battery housing; battery cells in the battery
housing; a temperature-control system having a liquid
temperature-control medium configured to cooling and/or heat the
battery cells in the battery housing; and at least one absorption
element arranged between the battery cells and the battery housing
and configured to absorb any of the liquid temperature-control
medium discharged from the temperature-control system, wherein the
at least one absorption element is composed of a non-woven material
including fibres of at least two different fibre types, at least
one of the at least two fibre types being a supporting fibre and at
least one other of the fibre types being an absorption fibre; and
wherein the non-woven material has an average area-related mass in
a range between 250 to 700 g/m.sup.2.
[0013] In accordance with embodiments, a battery system may include
at least one of: a plurality of battery cells; a
temperature-control system configured to permit a flow of a liquid
temperature-control medium to at least one of cool and heat the
battery cells; and an absorption element composed of a supporting
fibre and an absorption fibre and which is arranged adjacent to the
battery cells and configured to absorb and bind any of the liquid
temperature-control medium discharged from the temperature-control
system.
[0014] In accordance with embodiments, a battery system for a motor
vehicle may include at least one of: a battery system that includes
a battery housing; battery cells in the battery housing; a
temperature-control system having a liquid temperature-control
medium configured to cooling and/or heat the battery cells in the
battery housing; and at least one absorption element arranged
between the battery cells and the battery housing and configured to
absorb any of the liquid temperature-control medium discharged from
the temperature-control system, wherein the at least one absorption
element is composed of a non-woven material including fibres of at
least two different fibre types, at least one of the at least two
fibre types being a supporting fibre and at least one other of the
fibre types being an absorption fibre; and wherein the non-woven
material has an average area-related mass in a range between 250 to
700 g/m.sup.2.
[0015] The result is thus an absorption element which is firstly
particularly elastic as a result of the effect of the supporting
fibre and secondly has a high absorbent capacity as a result of the
action of the absorption fibre.
[0016] In order that the battery system of a vehicle is not damaged
in an accident, a battery housing in accordance with embodiments
may be of correspondingly rigid and stable configuration. In order
to achieve this, the battery housing may include beads, ribs and
other reinforcing devices. In the case of a suitable position,
liquid temperature-control medium which is discharged may pass into
depressions and intermediate spaces which are formed by the
reinforcing geometry. On account of their compact construction,
non-woven materials of conventional construction are incapable of
filling the intermediate spaces and depressions in such a way that
discharged liquid temperature-control medium may be absorbed
reliably. If discharged liquid temperature-control medium remains
in the intermediate spaces and depressions, undesired flows may
occur within the battery system in the case of a corresponding
position of the vehicle. Electrochemical reactions, for example,
the decomposition of water with the release of hydrogen, or else
short-circuit flows with local overheating are possible
consequences.
[0017] In accordance with embodiments, the absorption element may
have an average area-related mass in a range between 300 to 450
g/m.sup.2.
[0018] In accordance with embodiments, in the absorption element,
the weight proportion of the supporting fibre may be in a range
between 1% and 40% and the weight proportion of the absorption
fibre may be in a range between 60% and 99%.
[0019] In accordance with embodiments, the weight proportion of the
supporting fibre may be in a range between 2% and 30% and the
weight proportion of the absorption fibre may be in a range between
70% and 98%. The weight proportion of the supporting fibre may be
kept low by way of the use of a suitable elastic material for the
supporting fibre. A high weight proportion of absorption fibres
brings about a high absorption capacity of the nonwoven in
accordance with embodiments.
[0020] In accordance with embodiments, in an unloaded state, the
absorption element may have an overall height in a range between 3
mm to 40 mm. In accordance with embodiments, an unloaded state
denotes a state in which the absorption element is neither pressed
mechanically nor loaded with liquid temperature-control medium. An
optimum overall height in the unloaded state may be considered in
conjunction with a desired degree of pressing of the absorption
element.
[0021] In accordance with embodiments, in an unloaded state, the
absorption element may have an overall height in a range between 3
mm to 10 mm. Advantageously, a particularly space-saving overall
design of battery systems results in tight installation spaces, low
overall heights proving advantageous, once again in conjunction
with a desired degree of pressing of the absorption element.
[0022] In accordance with embodiments, the absorption element may
have a reduced overall height in certain sections thereof. Thus,
local differences of the cavities which are provided in the battery
housing may be compensated for with a simultaneously optimum degree
of pressing of the nonwoven.
[0023] In accordance with embodiments, certain sections of the
absorption element with a reduced overall height in the unloaded
state may have the same density as sections of the absorption
element with a non-reduced overall height. This advantageously
achieves a situation where there is an optimum degree of pressing
for a defined composition of the nonwoven everywhere in a manner
which is adapted to the spatial conditions in the battery housing
(e.g., beads, ribs, etc).
[0024] In accordance with embodiments, sections of the absorption
element with a reduced overall height in the unloaded state may
have the same area-related mass as sections of the absorption
element with a non-reduced overall height. The sections of the
absorption element which have a higher density are subjected to
correspondingly adapted pressing between the battery housing and
the battery cells during installation into the battery system. The
sections which have a higher density are preferably already formed
during the production of the absorption element, for example, by
way of a corresponding mechanical and/or thermal pre-treatment. As
a result of an embodiment of this type, the absorption element may
be shaped in such a way that its positioning in beads, ribs and
other reinforcing devices of the battery housing is simplified.
[0025] In accordance with embodiments, the absorption element may
be arranged in an elastically pressed manner between the battery
housing and the battery cells, the degree of pressing being in a
range between 1% to 80%. Alternatively, the degree of pressing may
be in a range between 10% to 50%. The elastic pressing of the
absorption element advantageously causes the absorption element to
be held reliably in a desired position in the battery system
without further fastening devices. The structural forming of one or
more absorption elements of the battery system may take place, for
example, in such a way that the absorption elements are held in
their position in the battery housing by way of shaped-out
mouldings of the battery housing and/or by other components. The
mounting of the absorption elements is also simplified
substantially as a result.
[0026] An excessively high degree of pressing limits the absorbing
capacity of the absorption element and impedes the distribution of
locally discharged liquid temperature-control medium over the
entire nonwoven which is available in the interior of the battery
housing. An optimum value for the degree of pressing is determined
in each case empirically in tests for a defined composition of the
nonwoven, and the absorption element is then dimensioned
correspondingly.
[0027] The absorption fibre may be configured to bind liquid
temperature-control medium in a pressure-resistant manner. To this
end, the absorption fibre in accordance with embodiments may have
"absorbing elements." In accordance with embodiments, "absorbing
elements" are understood as elements which are suitable for binding
liquid in a pressure-resistant manner. Here, the binding may take
place not only by way of simple adhesion, but rather, for example,
by way of an ion-dipole interaction between the liquid and the
"absorbing elements." As a consequence, a liquid which is absorbed
by the "absorbing elements" is no longer discharged regardless of
the spatial position of the nonwoven. Conventional absorbent
materials (woven fabrics, etc.) may bind a liquid merely in a
non-pressure-resistant manner. For example, in the case of a
deliberate change in the spatial position of an absorbent material,
the liquid which was first of all absorbed would be discharged
again at least partially.
[0028] The battery system in accordance with embodiments may be
configured in such a way that the absorption element bears directly
against the battery housing, at least in sections. As a result of
the arrangement of the absorption element directly on the battery
housing at least in sections, that is to say on the inner wall of
the battery housing, firstly the pressure which is required for the
elastic pressing is produced, and secondly it is ensured as a
result that the liquid temperature-control medium which is
discharged in the case of leaks and collects in depressions, for
example, between beads and/or ribs may be absorbed reliably.
[0029] The operational safety of battery systems is enhanced by way
of the proposed embodiments and measures.
DRAWINGS
[0030] Embodiments will be illustrated by way of example in the
drawings and explained in the description below.
[0031] FIG. 1 illustrates a diagrammatic sectional illustration of
a battery system in with an absorption element on the bottom of the
battery housing, in accordance with embodiments.
[0032] FIG. 2 illustrates a diagrammatic sectional illustration of
a battery system with two absorption elements and beads/ribs in the
battery housing, in accordance with embodiments.
DESCRIPTION
[0033] As illustrated in FIG. 1, a battery system in accordance
with embodiments includes a plurality of battery cells 13, each
battery cell having or otherwise operatively connected to cell
poles 14, 15. At one side of the plurality of battery cells 13 is a
cell monitoring unit 17 is arranged adjacent to the cell poles 14,
15 on spacer elements 18 in such a way that it spans the entirety
of the plurality of battery cells 13. The cell monitoring unit 17
may have devices configured to monitor operational characteristics
of the battery cells 13, such as, for example, the cell voltages
and/or the temperature of individual battery cells (for example,
voltage tapping elements and/or temperature sensors). The battery
cells 13 may be operatively connected to, or in communication with
one another via cell connectors. On a side of the battery cells 13
which is opposite to the cell monitoring unit 17 is a
temperature-control block 20 having an inlet opening 21 and an
outlet opening 22, each configured to permit the flow of a liquid
temperature-control medium which is temperature-controlled by an
external control device. The battery cells 13 may are arranged on
and/or over the temperature-control block 20 in such a way that the
temperature-control block 20 acts as a heat exchanger between the
battery cells 13 and the liquid temperature-control medium. The
temperature-control block 20 may be connected fixedly to the
battery housing 10 via carrier elements 23, 24. An absorption
element 30 is arranged on the bottom of the battery housing 10
between the battery housing 10 and the temperature-control block
20. The absorption element 30 may be configured to absorb and bind
the liquid temperature-control medium which is discharged from the
temperature-control block 20 in the case, for example, of
damage.
[0034] As illustrated in FIG. 2, an example of a battery system
having multiple absorption elements 30, 35. As in FIG. 1, the
temperature-control block 20 has an inlet opening 21 and an outlet
opening 22 configured to permit the flow of a liquid
temperature-control medium which is temperature-controlled by an
external control device. For mechanical reinforcement, the battery
housing 10 may have a plurality of mechanical reinforcing elements
11, such as, for example, beads, ribs, webs, etc. An absorption
element 30 may be arranged in the lower region of the battery
housing 10 and may also have a reduced overall height in the region
of the reinforcing elements 11. This advantageously ensures that
the liquid temperature-control medium which is discharged locally
at one area/region may be distributed over the lower absorption
element 30 and the existing absorption capacity of the lower
absorption element may thus be utilized fully.
[0035] A second absorption element 35 may be arranged in an upper
region of the battery system between the cell monitoring unit 17
and the inner wall of the battery housing 10. This advantageously
ensures that any liquid temperature-control medium which is
discharged is absorbed reliably in a motor vehicle which comes to
rest on its roof in an accident. Corresponding additional
absorption elements 35 may also be provided on the inside of the
side walls of the battery housing 10 and in other cavities in the
interior of the battery housing to further enhance the safety
features.
[0036] The absorption element(s) 30, 35 may have an average
area-related mass in a range between 300 to 450 g/m.sup.2. In the
absorption element(s) 30, 35, the weight proportion of the
supporting fibre may be in a range between 1% and 40% and the
weight proportion of the absorption fibre may be in a range between
60% and 99%. Alternatively, the weight proportion of the supporting
fibre may be in a range between 2% and 30% and the weight
proportion of the absorption fibre may be in a range between 70%
and 98%. The weight proportion of the supporting fibre may be kept
low by way of the use of a suitable elastic material for the
supporting fibre. A high weight proportion of absorption fibres
brings about a high absorption capacity of the nonwoven in
accordance with embodiments.
[0037] In an unloaded state, the absorption element(s) 30, 35 may
have an overall height in a range between 3 mm to 40 mm. An
unloaded state in accordance with embodiments denotes a state in
which the absorption element(s) 30, 35 is neither pressed
mechanically nor loaded with liquid temperature-control medium. An
optimum overall height in the unloaded state may be considered in
conjunction with a desired degree of pressing of the absorption
element(s) 30, 35.
[0038] In an unloaded state, the absorption element(s) 30, 35 may
have an overall height in a range between 3 mm to 10 mm.
Advantageously, a particularly space-saving overall design of
battery systems results in tight installation spaces, low overall
heights proving advantageous, once again in conjunction with a
desired degree of pressing of the absorption element(s) 30, 35.
[0039] The absorption element(s) 30, 35 may have a reduced overall
height in certain sections thereof. Thus, local differences of the
cavities which are provided in the battery housing 10 may be
compensated for with a simultaneously optimum degree of pressing of
the nonwoven.
[0040] Certain sections of the absorption element(s) 30, 35 with a
reduced overall height in the unloaded state may have the same
density as sections of the absorption element(s) 30, 35 with a
non-reduced overall height. This advantageously achieves a
situation where there is an optimum degree of pressing for a
defined composition of the nonwoven everywhere in a manner which is
adapted to the spatial conditions in the battery housing 10 (e.g.,
beads, ribs, etc).
[0041] Sections of the absorption element(s) 30, 35 with a reduced
overall height in the unloaded state may have the same area-related
mass as sections of the absorption element(s) 30, with a
non-reduced overall height. The sections of the absorption
element(s) 30, 35 which have a higher density are subjected to
correspondingly adapted pressing between the battery housing 10 and
the battery cells 13 during installation into the battery system.
The sections which have a higher density already formed during the
production of the absorption element(s) 30, 35, for example, by way
of a corresponding mechanical and/or thermal pre-treatment. As a
result of an embodiment of this type, the absorption element(s) 30,
35 may be shaped in such a way that its positioning in beads, ribs
and other reinforcing devices 11 of the battery housing 10 is
simplified.
[0042] The absorption element(s) 30, 35 may be arranged in an
elastically pressed manner between the battery housing 10 and the
battery cells 13, the degree of pressing being in a range between
1% to 80%. Alternatively, the degree of pressing may be in a range
between 10% to 50%. The elastic pressing of the absorption
element(s) 30, 35 advantageously causes the absorption element(s)
30, 35 to be held reliably in a desired position in the battery
system without further fastening devices. The structural forming of
one or more absorption element(s) 30, 35 of the battery system may
take place, for example, in such a way that the absorption
element(s) 30, 35 are held in their position in the battery housing
10 by way of shaped-out mouldings of the battery housing 10 and/or
by other components. The mounting of the absorption element(s) 30,
35 is also simplified substantially as a result.
[0043] An excessively high degree of pressing limits the absorbing
capacity of the absorption element(s) 30, 35 and impedes the
distribution of locally discharged liquid temperature-control
medium over the entire non-woven material which is available in the
interior of the battery housing 10. An optimum value for the degree
of pressing is determined in each case empirically in tests for a
defined composition of the nonwoven, and the absorption element(s)
30, 35 is then dimensioned correspondingly.
[0044] The absorption fibre may be configured to bind liquid
temperature-control medium in a pressure-resistant manner. To this
end, the absorption fibre in accordance with embodiments may have
"absorbing elements." In accordance with embodiments, "absorbing
elements" are understood as elements which are suitable for binding
liquid in a pressure-resistant manner. Here, the binding may take
place not only by way of simple adhesion, but rather, for example,
by way of an ion-dipole interaction between the liquid and the
"absorbing elements." As a consequence, a liquid which is absorbed
by the "absorbing elements" is no longer discharged regardless of
the spatial position of the nonwoven. Conventional absorbent
materials (woven fabrics, etc.) may bind a liquid merely in a
non-pressure-resistant manner. For example, in the case of a
deliberate change in the spatial position of an absorbent material,
the liquid which was first of all absorbed would be discharged
again at least partially.
[0045] The battery system in accordance with embodiments may be
configured in such a way that the absorption element(s) 30, 35
bear(s) directly against the battery housing 10, at least in
sections. As a result of the arrangement of the absorption
element(s) 30, 35 directly on the battery housing 10 at least in
sections, that is to say on the inner wall of the battery housing
10, firstly the pressure which is required for the elastic pressing
is produced, and secondly it is ensured as a result that the liquid
temperature-control medium which is discharged in the case of leaks
and collects in depressions, for example, between beads and/or ribs
may be absorbed reliably.
[0046] The claimed ranges for area-related mass and/or density were
determined empirically in test series with different nonwoven
compositions and indicate an average area-related mass (or density)
in the unloaded state (that is to say, unloaded with
temperature-control medium and non-pressed).
[0047] A battery system in accordance with the invention comprises
at least one battery module. A battery module comprises a plurality
of battery cells (or electrochemical storage cells). If the battery
system comprises more than one battery module, each battery module
may either have a dedicated temperature-control block, or all
battery modules utilize a common temperature-control block. Each
battery module also usually comprises a cell monitoring unit which
is arranged in the immediate vicinity of the cell poles of the
battery cells.
[0048] In accordance with embodiments, the designation of vehicle
includes, for example, motor vehicles, rail vehicles, and also
watercraft and aircraft. All of the pressure values stated are by
way of example and do not in any way limit the invention and the
pressure range for which embodiments is claimed.
[0049] The term "coupled" or "connected" may be used herein to
refer to any type of relationship, direct or indirect, between the
components in question, and may apply to electrical, mechanical,
fluid, optical, electromagnetic, electromechanical or other
connections. In addition, the terms "first," "second," etc. are
used herein only to facilitate discussion, and carry no particular
temporal or chronological significance unless otherwise
indicated.
[0050] Those skilled in the art will appreciate from the foregoing
description that the broad techniques of the embodiments may be
implemented in a variety of forms. Therefore, while the embodiments
have been described in connection with particular examples thereof,
the true scope of the embodiments should not be so limited since
other modifications will become apparent to the skilled
practitioner upon a study of the drawings, specification, and
following claims.
LIST OF REFERENCE SIGNS
[0051] 10 Battery housing [0052] 11 Reinforcing elements (beads,
webs, ribs) [0053] 13 Battery cell [0054] 14, 15 Cell poles [0055]
17 Cell monitoring unit [0056] 18 Spacer element [0057] 20
Temperature-control block/heat exchanger [0058] 21 Inlet opening
[0059] 22 Outlet opening [0060] 23, 24 Carrier elements [0061] 30
First (lower) absorption element [0062] 35 Second (upper)
absorption element
* * * * *